diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000000..d6ddf55d185
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,18 @@
+[submodule "htdocs/custom/productdiscount"]
+	path = htdocs/custom/productdiscount
+	url = git+ssh://scm.doliforge.org/gitroot/productdiscount/productdiscount.git
+[submodule "htdocs/custom/multicompany"]
+	path = htdocs/custom/multicompany
+	url = git+ssh://scm.doliforge.org/gitroot/multicompany/multicompany.git
+[submodule "htdocs/custom/paypalplus"]
+	path = htdocs/custom/paypalplus
+	url = git+ssh://scm.doliforge.org/gitroot/paypal/paypal.git
+[submodule "htdocs/custom/milestone"]
+	path = htdocs/custom/milestone
+	url = git+ssh://scm.doliforge.org/gitroot/milestone/milestone.git
+[submodule "htdocs/custom/dropbox"]
+	path = htdocs/custom/dropbox
+	url = git+ssh://scm.doliforge.org/gitroot/dropbox/dropbox.git
+[submodule "htdocs/custom/docgen"]
+	path = htdocs/custom/docgen
+	url = git+ssh://scm.doliforge.org/gitroot/docgen/docgen.git
diff --git a/htdocs/custom/docgen b/htdocs/custom/docgen
new file mode 160000
index 00000000000..892f73e7c15
--- /dev/null
+++ b/htdocs/custom/docgen
@@ -0,0 +1 @@
+Subproject commit 892f73e7c15223644bfa980fbedb14c31b2c4172
diff --git a/htdocs/custom/dropbox b/htdocs/custom/dropbox
new file mode 160000
index 00000000000..69c05090e23
--- /dev/null
+++ b/htdocs/custom/dropbox
@@ -0,0 +1 @@
+Subproject commit 69c05090e23b487912843de657b5ef5e6e774f42
diff --git a/htdocs/custom/milestone b/htdocs/custom/milestone
new file mode 160000
index 00000000000..eba88cab13b
--- /dev/null
+++ b/htdocs/custom/milestone
@@ -0,0 +1 @@
+Subproject commit eba88cab13b18aba6ee012a4cd3c24f4e86b4524
diff --git a/htdocs/custom/multicompany b/htdocs/custom/multicompany
new file mode 160000
index 00000000000..f4ca36ca040
--- /dev/null
+++ b/htdocs/custom/multicompany
@@ -0,0 +1 @@
+Subproject commit f4ca36ca0402c555f44995c519974e6e014ab61c
diff --git a/htdocs/custom/paypalplus b/htdocs/custom/paypalplus
new file mode 160000
index 00000000000..18f0be9c65f
--- /dev/null
+++ b/htdocs/custom/paypalplus
@@ -0,0 +1 @@
+Subproject commit 18f0be9c65f631ac879bae36221d3f9523848faa
diff --git a/htdocs/custom/productdiscount b/htdocs/custom/productdiscount
new file mode 160000
index 00000000000..70a47244b85
--- /dev/null
+++ b/htdocs/custom/productdiscount
@@ -0,0 +1 @@
+Subproject commit 70a47244b851900e073b28243bd9e84090d53d82